The invention provides a synthetic dibutyl carbonate catalyst, and a preparation method and an application thereof, belonging to the technical field of catalyst preparation. The synthetic dibutyl carbonate catalyst comprises components of ZnO, NiO, alkaline earth metal oxide, alkali metal oxide and a carrier with a weight ratio of 100: (3-60): (0.1-40): (0.1-10): (2-50). The preparation method for the synthetic dibutyl carbonate catalyst comprises the following steps: 1) filter cake preparation; 2) catalyst slurry preparation; and 3) catalyst molding. The synthetic dibutyl carbonate catalyst provided by the invention has high catalytic activity, long service life and high mechanical strength; the preparation method for the synthetic dibutyl carbonate catalyst is simple, convenient and practicable, and is applicable to large-scale industrial production; and the synthetic dibutyl carbonate catalyst is applicable to a reaction of n-butyl alcohol and urea for preparation of dibutyl carbonate.